def get_num_perfect(scores):
  num_perfect=0
  for score in scores:
    if score>=90:
        num_perfect=num_perfect+1
  return num_perfect
  
def get_num_low70(scores):
  num_low70=0
  for score in scores:
    if score<70:
        num_low70=num_low70+1
  return num_low70